Brake shoe



Aug. 12, 1930.

E. SLQD E BRAKE SHOE Filed May 13, 1925 I snout/6oz Maw Patented Aug. 1 2, 1930 mm sums, or new Yonx, n. Y.

- Basin snon Application filed May 13, 1925. Serial No. 29,971.

This invention relates to a friction brake, and particularly to the mounting of a friction brake upon a carrier such as a brake band or shoe, and to the "article produced 5 thereby.

backing, and showing .are arranged in.

In the drawings I have illustrated one'embodiment of the invention showinsr a brake mounted upon a brake shoe, but I of course do'not desire to be limited to this embodiment, as this is selected-for illustrative purposes.

In the'drawings:

Figure 1 is a perspective view of a portion of a brake shoe with the brake lining and its backing attached thereto, partof the lining and part of the shoe being broken away to more clearly illustrate the construction;

Figure 2 isa longitudinal sectional View taken through the shoe, the lining and the the relation of the parts to the brake drum; t

Figure 3 is a plan view of the blank fromwhich the lining backing is formed; and

Figure 4 is a transverse section.

In the embodiment of the article illustrated in the drawings, the lining 1, which may be of any of thewell-known forms,-but whic is preferably of the form disclosed in my copendingapplidation Serial No. 605,524, filed December 7, 1922, is attached to a backing 2. This backing is preferably of metal having the body portion 3 and end portions 4. The body portion 3 of the backing is provided with a series of projections 5 which are formed by depressing portions of the body of the backing. The production. of these pro ections 5 results in the formation of depressions or troughs 6. At the ends of the projections 5 openings 7 are formed, and these openings 7, as well asthe projections 5 of one segies, staggered relation to the ections of the adjacent seopenings and proj ries.

The lining 1 is secured to the backing 2 by means of separate stitches 8-, which pass through thelopenings 7 with their bight po depressions 6, and through the lining 1, turned toward each other and clinched or upzig zag line ofsecurement of set in the face of the lining, as shown in Figure 1 of the drawings.

It. is to be noted, as shown in Figure 1, that the stitches pass through the lining at several transverse ints, so that the lining is secured on the acking in a flat conditlon. I have shown thesti'tches as arranged in rows, the stitches of one row being staggered with relation to the stitches of the neat adjacent row, which stag'geringincreases the efliciency of the attachment by producing an effective the lining to the backing. 3

l The method of forming the brake element when a folded lining such as I have hereinbefore described is used, consists in first inipregnating the cloth with the desired lubricant-bearing compound, then cutting the same to the proper size and folding it so that the raw edges are turned inwardly. The

' lining thus. folded is brought to size underpressure so that it assumes a somewhat definite form. This lining is then assembled with the backing, that is, brought face to face with the backing in which projections 5 have alreadybeen formed incidental tothe formation of the depressions 6. With the backing and lining thus assembled the stitches are forced through the openings in the backing, and through the lining, their ends being turned over on the face of the lining. I The lining and backing thus assembled are then baked to impart to the lining the necessary wear-resisting qualitites and to set the lubricant-bearing compound thoroughly therein. 8

Following this baking operation the lining is pressed upon the backing and squared to shape. This pressure ofcourse clinches the stitches in. the lining and forges the projections 5-into the lining. The pressure during the compressingand squaring operation is so great that with the cooperation of the stitches and the projectionsfi, the lining and backing become substantially a unitary struc-' ture. When a lining of a different form is used it is compressed, preferably, after it has been assembled'with the backing so that it becomes aunitary structure with the backng. r

In order that thepbacking carrying the dated without any contact with the backing.

' which may rier, but may,

brake lining may be attached to the carrier,

such, for instance, as the brake shoe 9, I have constructed the ends of the backing so that they may be bent around edges of the carrier either at the ends of the carrier or between the ends thereof.

In the drawings I have shown the ends of the backing 2 reduced as at 4, but under some circumstances it may be undesirable to so reduce the ends as the purpose is to accommodate them to' the particular shoe to which the backing is to be attached. In the form illustrated in the drawings the ends of the backing 2 are bent around the edges of the shoe 9 so that the strain which is incidental to the use of the brake lining, and which is long1- tudinal of the brake lining, is taken up by the engagement of the bentends with the edges of the shoe 10 irrespective of whether or not the forceapplied is in one longitudinal direction or the opposite.

These ends are secured to the shoe 9 by means of rivets 11 which pass through openings in the shoe with their heads preferabl located on the under side of the shoe, and which are upset as at 13 on the face ofthe shoe. These upset ends 13 of the rivets are located within recesses 14 in the backing 2, which recesses are larger than the upset ends of the rivets so that the latter are accommo- The force which is applied to the brake lining will not be applied to the upset ends 13 of the rivets, but will, in fact, be assumed entirely by the engagement of the bent ends of the backing with the edges of the shoe. The rivets-11 will, therefore, merely serve to maintain the ends of the backing in place upon the shoe rather than take up any of the strain incidental to the use of the lining.

It is to be noted that the blank which forms the backing 2 is provided with the openings 12 and 14 prior to the application of the backing to the shoe, and may, in fact, be provided with these openings prior to the assembly of the backing 2 and the lining 1. This pre-formation of the attaching means at the ends of the backing and the attachment of the lining to thebacking prior to the application to the carrier results in the formation of a complete article of manufacture be of standardized -sizes so that the installation of the braking element upon the carrier simply entails bending the ends of the backing around the edges of the carrier, and the securing, by means of rivets or other-wise, of the ends of the backing to the carrier.

I have described the attaching of the backmg to the carrier by the bending of the ends of the backing around the edges of the carrier and I wish it to be understood that these edges need not be the end edges of the carin fact, be edges producedby slots in the face or side of the carrier.

It will be seen fromthe foregoing description that I have provided a brake element which maybe of standardized lengths, which will obviate the necessity of cutting the lining from a supply to fit the particular carrier to which it is to be applied.- Furthermore, I have so constructed the brake element that its application to the carrier would be simple and yet the strains incidental to the use of the lining will be ineffective to detach the lining from the backing or the backing from the carrier.

I claim:

1. In a device of the class described the combination with a carrier of a metallic backed brake lining, the ends of the backing being bent around the edges of the carrier, and rivets securing the ends of the backing to the carrier, the body of the carriers having openings for the free accommodation of the ends of the rivets.

2. An article of manufacture including a brake lining and a metallic backing therefor, said backing having rivet receiving openings in the ends thereof, and having relatively larger openings for housing the ends of the rivet-s.

3. In a device of the character described a brake shoe, a brake lining and a metallic backing therefor, said backing having reduced end portions provided with rivet receiving openings, the ends of the backing being bent around the edges of the brake shoe and rivets securing the ends of the backing to the brake shoe, the body of the shoe having openings for the free accommodation of the ends of the rivets.

4. In a device of the character described a carrier for brake lining, a brake linin' having a metallic backing, said backing having reduced end portions provided with rivet receiving openings and having relatively larger openings in spaced relation for housing the ends of the rivets.

5. In a device of the character described the combination with a carrier of a metallic backed brake lining, said backing having reduced end portions adapted to be bent around the edges of the carrier, rivet receiving openings in the end portions and relatively larger openings for housing the endsof the rivets.

6. In a device of the character described, a carrier for brake lining, a brake lining having a metallic backing, the ends of the metallic backing being bent around the edges of the carrier. said ends of the backing being provided with rivet receiving openings and having relatively larger openings for housing the ends of the rivets.

7. In a device of the character described, an arcuate brake shoe, a metallic backing extending along the outside of the brake shoe on the convex side thereof, and having its ends turned inwardly around the ends of the brake shoe, one end of the backing havbacking positioned on the convex,

and also having another opening smaller than the opposite end of the rivet, and a rivet passing through said openings.

8. Ina device of the character described,. v an arcuate brake shoe of substantially inings and through the shoe, said larger opena ing freely'accommodating the outer end of the rivet.

3 9. In a device of the character described a brake shoe, a metallic backing member overlying the same and having its ends turned around the ends of the brake shoe, means for securing said turned endsto the shoe, a brake lining carried by said backing member, said member being provided with elongated eyelets struck up therefrom and the lining being attached by clips passing through said eyelets and clinched to the lining.

' In testimony whereof, I have signed my name to this specification this 12th dayof I May, 1925.

EDWARD SLADE.

mg an opening larger than one end of a rivet Y 1 large and small openings 

